Simple Filament Spool Holder for Qidi Tech 1

I really don't like the big fat spool holders that came with my Qidi Tech 1. Well, they are super well made and good looking, but they don't fit every spool I have.

I finally got around to taking out the stud in the printer case and measuring it - M10-1.5. Then I went to Home Depot and bought a couple of M10-1.5X100mm bolts. They do the job perfectly! Not only do they fit every spool I have, but the spools hang lower so they give more clearance to the filament as it goes to the Bowden tube.